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<title>Selection.addRange() tests</title>
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"use strict";

function testAddRange(exception, range, endpoints, qualifier, testName) {
	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");

		selection.addRange(range);

		assert_equals(range.startContainer, endpoints[0],
			"addRange() must not modify the startContainer of the Range it's given");
		assert_equals(range.startOffset, endpoints[1],
			"addRange() must not modify the startOffset of the Range it's given");
		assert_equals(range.endContainer, endpoints[2],
			"addRange() must not modify the endContainer of the Range it's given");
		assert_equals(range.endOffset, endpoints[3],
			"addRange() must not modify the endOffset of the Range it's given");
	}, testName + ": " + qualifier + " addRange() must not throw exceptions or modify the range it's given");

	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");

		assert_equals(selection.rangeCount, 1, "rangeCount must be 1");
	}, testName + ": " + qualifier + " addRange() must result in rangeCount being 1");

	// From here on out we check selection.getRangeAt(selection.rangeCount - 1)
	// so as not to double-fail Gecko.

	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");
		assert_not_equals(selection.rangeCount, 0, "Cannot proceed with tests if rangeCount is 0");

		var newRange = selection.getRangeAt(selection.rangeCount - 1);

		assert_not_equals(newRange, null,
			"getRangeAt(rangeCount - 1) must not return null");
		assert_equals(typeof newRange, "object",
			"getRangeAt(rangeCount - 1) must return an object");

		assert_equals(newRange.startContainer, range.startContainer,
			"startContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.startOffset, range.startOffset,
			"startOffset of the Selection's last Range must match the added Range");
		assert_equals(newRange.endContainer, range.endContainer,
			"endContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.endOffset, range.endOffset,
			"endOffset of the Selection's last Range must match the added Range");
	}, testName + ": " + qualifier + " addRange() must result in the selection's last range having the specified endpoints");

	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");
		assert_not_equals(selection.rangeCount, 0, "Cannot proceed with tests if rangeCount is 0");

		assert_equals(selection.getRangeAt(selection.rangeCount - 1), range,
			"getRangeAt(rangeCount - 1) must return the same object we added");
	}, testName + ": " + qualifier + " addRange() must result in the selection's last range being the same object we added");

	// Let's not test many different modifications -- one should be enough.
	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");
		assert_not_equals(selection.rangeCount, 0, "Cannot proceed with tests if rangeCount is 0");

		if (range.startContainer == paras[0].firstChild
		&& range.startOffset == 0
		&& range.endContainer == paras[0].firstChild
		&& range.endOffset == 2) {
			// Just in case . . .
			range.setStart(paras[0].firstChild, 1);
		} else {
			range.setStart(paras[0].firstChild, 0);
			range.setEnd(paras[0].firstChild, 2);
		}

		var newRange = selection.getRangeAt(selection.rangeCount - 1);

		assert_equals(newRange.startContainer, range.startContainer,
			"After mutating the " + qualifier + " added Range, startContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.startOffset, range.startOffset,
			"After mutating the " + qualifier + " added Range, startOffset of the Selection's last Range must match the added Range");
		assert_equals(newRange.endContainer, range.endContainer,
			"After mutating the " + qualifier + " added Range, endContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.endOffset, range.endOffset,
			"After mutating the " + qualifier + " added Range, endOffset of the Selection's last Range must match the added Range");
	}, testName + ": modifying the " + qualifier + " added range must modify the Selection's last Range");

	// Now test the other way too.
	test(function() {
		assert_equals(exception, null, "Test setup must not throw exceptions");
		assert_not_equals(selection.rangeCount, 0, "Cannot proceed with tests if rangeCount is 0");

		var newRange = selection.getRangeAt(selection.rangeCount - 1);

		if (newRange.startContainer == paras[0].firstChild
		&& newRange.startOffset == 4
		&& newRange.endContainer == paras[0].firstChild
		&& newRange.endOffset == 6) {
			newRange.setStart(paras[0].firstChild, 5);
		} else {
			newRange.setStart(paras[0].firstChild, 4);
			newRange.setStart(paras[0].firstChild, 6);
		}

		assert_equals(newRange.startContainer, range.startContainer,
			"After " + qualifier + " addRange(), after mutating the Selection's last Range, startContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.startOffset, range.startOffset,
			"After " + qualifier + " addRange(), after mutating the Selection's last Range, startOffset of the Selection's last Range must match the added Range");
		assert_equals(newRange.endContainer, range.endContainer,
			"After " + qualifier + " addRange(), after mutating the Selection's last Range, endContainer of the Selection's last Range must match the added Range");
		assert_equals(newRange.endOffset, range.endOffset,
			"After " + qualifier + " addRange(), after mutating the Selection's last Range, endOffset of the Selection's last Range must match the added Range");
	}, testName + ": modifying the Selection's last Range must modify the " + qualifier + " added Range");
}

// Do only n evals, not n^2
var testRangesEvaled = testRanges.map(eval);

for (var i = 0; i < testRanges.length; i++) {
	for (var j = 0; j < testRanges.length; j++) {
		var testName = "Range " + i + " " + testRanges[i]
			+ " followed by Range " + j + " " + testRanges[j];

		var exception = null;
		try {
			selection.removeAllRanges();

			var endpoints1 = testRangesEvaled[i];
			var range1 = ownerDocument(endpoints1[0]).createRange();
			range1.setStart(endpoints1[0], endpoints1[1]);
			range1.setEnd(endpoints1[2], endpoints1[3]);

			if (range1.startContainer !== endpoints1[0]) {
				throw "Sanity check: the first Range we created must have the desired startContainer";
			}
			if (range1.startOffset !== endpoints1[1]) {
				throw "Sanity check: the first Range we created must have the desired startOffset";
			}
			if (range1.endContainer !== endpoints1[2]) {
				throw "Sanity check: the first Range we created must have the desired endContainer";
			}
			if (range1.endOffset !== endpoints1[3]) {
				throw "Sanity check: the first Range we created must have the desired endOffset";
			}

			var endpoints2 = testRangesEvaled[j];
			var range2 = ownerDocument(endpoints2[0]).createRange();
			range2.setStart(endpoints2[0], endpoints2[1]);
			range2.setEnd(endpoints2[2], endpoints2[3]);

			if (range2.startContainer !== endpoints2[0]) {
				throw "Sanity check: the second Range we created must have the desired startContainer";
			}
			if (range2.startOffset !== endpoints2[1]) {
				throw "Sanity check: the second Range we created must have the desired startOffset";
			}
			if (range2.endContainer !== endpoints2[2]) {
				throw "Sanity check: the second Range we created must have the desired endContainer";
			}
			if (range2.endOffset !== endpoints2[3]) {
				throw "Sanity check: the second Range we created must have the desired endOffset";
			}
		} catch (e) {
			exception = e;
		}

		testAddRange(exception, range1, endpoints1, "first", testName);
		testAddRange(exception, range2, endpoints2, "second", testName);
	}
}

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